/* 课程首页和课程详情样式，复用 my-webapp 中的设计 */
.courses-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, #6A11CB 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
    margin-bottom: 40px;
}

.courses-hero h1 {
    font-size: 2rem;
    margin-bottom: 12px;
    line-height: 1.3;
}

.courses-hero p {
    font-size: 1rem;
    opacity: 0.9;
    max-width: 100%;
    margin: 0 auto;
    line-height: 1.5;
}

/* 课程网格 */
.courses-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 20px;
}

.course-card {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    cursor: pointer;
    margin-bottom: 15px;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.course-card-header {
    padding: 20px 16px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, #3A5BD0 100%);
    color: white;
}

.course-card-header h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.course-card-body {
    padding: 16px;
}

.course-card-body p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.course-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--text-light);
    font-size: 0.85rem;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

/* 响应式断点 - 平板 */
@media (min-width: 768px) {
    .courses-hero {
        padding: 60px 40px;
    }
    
    .courses-hero h1 {
        font-size: 2.5rem;
    }
    
    .courses-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 24px;
        padding: 30px 40px;
    }
}

/* 响应式断点 - 桌面 */
@media (min-width: 1024px) {
    .courses-hero {
        padding: 80px 0;
    }
    
    .courses-hero h1 {
        font-size: 3rem;
    }
    
    .courses-hero p {
        font-size: 1.2rem;
        max-width: 600px;
    }
    
    .courses-grid {
        gap: 30px;
        padding: 40px 0;
    }
    
    .course-card {
        margin-bottom: 0;
    }
    
    .course-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-lg);
    }
}